Senior Python Developer

About the Position

Senior Python Developer

Nantes, Pays de la Loire, France

Lengow is a leader in intelligent e-commerce solutions that help brands and retailers drive profitable growth across the digital shelf. With powerful feed management, global price monitoring, and robust data capabilities, Lengow’s comprehensive SaaS product suite enables merchants to amplify product visibility online, outrun competition with informed pricing, multiply sales on marketplaces, and monitor brand presence among distributors. Since 2009, Lengow has fueled digital growth for over 3,600 customers across thousands of marketing and sales channels in over 60 countries.

Responsibilities

• Development:

  • Design, develop, and maintain high-quality Python applications and services.

• Clean Architecture:

  • Implement and advocate for clean architecture principles to ensure a scalable, maintainable, and testable codebase.

• CI/CD Pipeline Management:

  • Design, implement, and maintain CI/CD pipelines using GitHub Actions and ArgoCD to automate workflows, deployments, and infrastructure management.

• Code Review and Mentorship:

  • Conduct code reviews, provide constructive feedback, and mentor junior developers to uphold best practices and coding standards.

• Testing:

  • Develop and maintain unit, integration, and end-to-end tests to ensure software quality and reliability.

Requirements

Experiences:

• 4 years as Software developer in Python or other Object-oriented programming language
• Proven ability to integrate AI Agents into the development lifecycle (e.g., automated code reviews, agentic testing, or AI-driven CI/CD) to enhance developer productivity and software quality.

Skills & Soft Skills:

• Core Skills:

  • Python
  • Django
  • PostgreSQL
  • Celery
  • Docker

• Secondary Skills:

  • Design & Architecture
  • Leadership

Nice to Have

• Curious / Autonomous / Good analytical skills / Force of proposal / Problem Solver

We Offer

✨ Joining Lengow is also an opportunity to benefit from many advantages:

• Ticket restaurant 8 euros by day
• Malakoff Humanis Private insurance & Prevoyance.
• 3 Remote days per week
• Flexible hours
• Bike mileage allowances or 50% of transportation tickets.
• Remote allowances
• Professional events (Devoxx, Meetup...) and regular internal cohesion.
• Weekly Happy Break on Thursday Evening at the office with food and beverage
• Syntec forfait jours with RTT - 218 annual working days, i.e., minimum 9 days off on top of 5 weeks legal paid leave
• Choose your laptop OS. You can work on MacOS, Windows, or Linux.

About the Company

Lengow is a leader in intelligent e-commerce solutions that help brands and retailers drive profitable growth across the digital shelf. With powerful feed management, global price monitoring, and robust data capabilities, Lengow’s comprehensive SaaS product suite enables merchants to amplify product visibility online, outrun competition with informed pricing, multiply sales on marketplaces, and monitor brand presence among distributors. Since 2009, Lengow has fueled digital growth for over 3,600 customers across thousands of marketing and sales channels in over 60 countries.